Fusion of male gamete and definitive nucleus results in the formation of

Options

A. Primary endosperm cell
B. Primary endosperm nucleus
C. Zygote
D. Secondary nuclei

Answer

To solve the question regarding the fusion of the male gamete and the definitive nucleus, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Identify the Components**:
- The male gamete is haploid (1N).
- The definitive nucleus refers to the two polar nuclei found in the embryo sac, which fuse to form a diploid (2N) structure.

2. **Understand the Fusion Process**:
- When the male gamete (haploid) fuses with the definitive nucleus (which is diploid), the result is a combination of genetic material from both.

3. **Determine the Resulting Structure**:
- The fusion of the male gamete (1N) with the diploid definitive nucleus (2N) results in a triploid (3N) structure.
- This triploid structure is specifically known as the Primary Endospermic Nucleus (PEN).

4. **Function of the Primary Endospermic Nucleus**:
- The Primary Endospermic Nucleus serves an important role in the seed development process by providing stored food to the growing embryo, ensuring that it has the necessary nutrients for development.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the fusion of the male gamete and the definitive nucleus results in the formation of the Primary Endospermic Nucleus.

### Final Answer:
**Primary Endospermic Nucleus (PEN)**

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